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+# -*- coding: utf-8 -*-
+formset_tests = """
+# Basic FormSet creation and usage ############################################
+
+FormSet allows us to use multiple instance of the same form on 1 page. For now,
+the best way to create a FormSet is by using the formset_for_form function.
+
+>>> from django.newforms import Form, CharField, IntegerField
+>>> from django.newforms.formsets import formset_for_form
+
+>>> class Choice(Form):
+... choice = CharField()
+... votes = IntegerField()
+
+>>> ChoiceFormSet = formset_for_form(Choice)
+
+
+A FormSet constructor takes the same arguments as Form. Let's create a FormSet
+for adding data. By default, it displays 1 blank form. It can display more,
+but we'll look at how to do so later.
+
+>>> formset = ChoiceFormSet(auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" /></li>
+
+On thing to note is that there needs to be a special value in the data. This
+value tells the FormSet how many forms were displayed so it can tell how
+many forms it needs to clean and validate. You could use javascript to create
+new forms on the client side, but they won't get validated unless you increment
+the COUNT field appropriately.
+
+>>> data = {
+... 'choices-COUNT': '1', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... }
+
+We treat FormSet pretty much like we would treat a normal Form. FormSet has an
+is_valid method, and a clean_data or errors attribute depending on whether all
+the forms passed validation. However, unlike a Form instance, clean_data and
+errors will be a list of dicts rather than just a single dict.
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> formset.clean_data
+[{'votes': 100, 'choice': u'Calexico'}]
+
+
+FormSet instances can also have an error attribute if validation failed for
+any of the forms.
+
+>>> data = {
+... 'choices-COUNT': '1', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+False
+>>> formset.errors
+[{'votes': [u'This field is required.']}]
+
+Like a Form instance, clean_data won't exist if the formset wasn't validated.
+
+>>> formset.clean_data
+Traceback (most recent call last):
+...
+AttributeError: 'ChoiceFormSet' object has no attribute 'clean_data'
+
+
+We can also prefill a FormSet with existing data by providing an ``initial``
+argument to the constructor. ``initial`` should be a list of dicts. By default,
+an extra blank form is included.
+
+>>> initial = [{'choice': u'Calexico', 'votes': 100}]
+>>> formset = ChoiceFormSet(initial=initial, auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" value="Calexico" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" value="100" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" /></li>
+
+
+Let's simulate what would happen if we submitted this form.
+
+>>> data = {
+... 'choices-COUNT': '2', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-1-choice': '',
+... 'choices-1-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> formset.clean_data
+[{'votes': 100, 'choice': u'Calexico'}]
+
+But the second form was blank! Shouldn't we get some errors? No. If we display
+a form as blank, it's ok for it to be submitted as blank. If we fill out even
+one of the fields of a blank form though, it will be validated. We may want to
+required that at least x number of forms are completed, but we'll show how to
+handle that later.
+
+>>> data = {
+... 'choices-COUNT': '2', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-1-choice': 'The Decemberists',
+... 'choices-1-votes': '', # missing value
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+False
+>>> formset.errors
+[{}, {'votes': [u'This field is required.']}]
+
+
+If we delete data that was pre-filled, we should get an error. Simply removing
+data from form fields isn't the proper way to delete it. We'll see how to
+handle that case later.
+
+>>> data = {
+... 'choices-COUNT': '2', # the number of forms rendered
+... 'choices-0-choice': '', # deleted value
+... 'choices-0-votes': '', # deleted value
+... 'choices-1-choice': '',
+... 'choices-1-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+False
+>>> formset.errors
+[{'votes': [u'This field is required.'], 'choice': [u'This field is required.']}]
+
+
+# Displaying more than 1 blank form ###########################################
+
+We can also display more than 1 empty form at a time. To do so, pass a
+num_extra argument to formset_for_form.
+
+>>> ChoiceFormSet = formset_for_form(Choice, num_extra=3)
+
+>>> formset = ChoiceFormSet(auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" /></li>
+<li>Choice: <input type="text" name="choices-2-choice" /></li>
+<li>Votes: <input type="text" name="choices-2-votes" /></li>
+
+Since we displayed every form as blank, we will also accept them back as blank.
+This may seem a little strange, but later we will show how to require a minimum
+number of forms to be completed.
+
+>>> data = {
+... 'choices-COUNT': '3', # the number of forms rendered
+... 'choices-0-choice': '',
+... 'choices-0-votes': '',
+... 'choices-1-choice': '',
+... 'choices-1-votes': '',
+... 'choices-2-choice': '',
+... 'choices-2-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> formset.clean_data
+[]
+
+
+We can just fill out one of the forms.
+
+>>> data = {
+... 'choices-COUNT': '3', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-1-choice': '',
+... 'choices-1-votes': '',
+... 'choices-2-choice': '',
+... 'choices-2-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> formset.clean_data
+[{'votes': 100, 'choice': u'Calexico'}]
+
+
+And once again, if we try to partially complete a form, validation will fail.
+
+>>> data = {
+... 'choices-COUNT': '3', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-1-choice': 'The Decemberists',
+... 'choices-1-votes': '', # missing value
+... 'choices-2-choice': '',
+... 'choices-2-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+False
+>>> formset.errors
+[{}, {'votes': [u'This field is required.']}]
+
+
+The num_extra argument also works when the formset is pre-filled with initial
+data.
+
+>>> initial = [{'choice': u'Calexico', 'votes': 100}]
+>>> formset = ChoiceFormSet(initial=initial, auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" value="Calexico" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" value="100" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" /></li>
+<li>Choice: <input type="text" name="choices-2-choice" /></li>
+<li>Votes: <input type="text" name="choices-2-votes" /></li>
+<li>Choice: <input type="text" name="choices-3-choice" /></li>
+<li>Votes: <input type="text" name="choices-3-votes" /></li>
+
+
+If we try to skip a form, even if it was initially displayed as blank, we will
+get an error.
+
+>>> data = {
+... 'choices-COUNT': '4', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-1-choice': '',
+... 'choices-1-votes': '',
+... 'choices-2-choice': 'The Decemberists',
+... 'choices-2-votes': '12',
+... 'choices-3-choice': '',
+... 'choices-3-votes': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+False
+>>> formset.errors
+[{}, {'votes': [u'This field is required.'], 'choice': [u'This field is required.']}, {}]
+
+
+# FormSets with deletion ######################################################
+
+We can easily add deletion ability to a FormSet with an agrument to
+formset_for_form. This will add a boolean field to each form instance. When
+that boolean field is True, the cleaned data will be in formset.deleted_data
+rather than formset.clean_data
+
+>>> ChoiceFormSet = formset_for_form(Choice, deletable=True)
+
+>>> initial = [{'choice': u'Calexico', 'votes': 100}, {'choice': u'Fergie', 'votes': 900}]
+>>> formset = ChoiceFormSet(initial=initial, auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" value="Calexico" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" value="100" /></li>
+<li>Delete: <input type="checkbox" name="choices-0-DELETE" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" value="Fergie" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" value="900" /></li>
+<li>Delete: <input type="checkbox" name="choices-1-DELETE" /></li>
+<li>Choice: <input type="text" name="choices-2-choice" /></li>
+<li>Votes: <input type="text" name="choices-2-votes" /></li>
+<li>Delete: <input type="checkbox" name="choices-2-DELETE" /></li>
+
+To delete something, we just need to set that form's special delete field to
+'on'. Let's go ahead and delete Fergie.
+
+>>> data = {
+... 'choices-COUNT': '3', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-0-DELETE': '',
+... 'choices-1-choice': 'Fergie',
+... 'choices-1-votes': '900',
+... 'choices-1-DELETE': 'on',
+... 'choices-2-choice': '',
+... 'choices-2-votes': '',
+... 'choices-2-DELETE': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> formset.clean_data
+[{'votes': 100, 'DELETE': False, 'choice': u'Calexico'}]
+>>> formset.deleted_data
+[{'votes': 900, 'DELETE': True, 'choice': u'Fergie'}]
+
+# FormSets with ordering ######################################################
+
+We can also add ordering ability to a FormSet with an agrument to
+formset_for_form. This will add a integer field to each form instance. When
+form validation succeeds, formset.clean_data will have the data in the correct
+order specified by the ordering fields. If a number is duplicated in the set
+of ordering fields, for instance form 0 and form 3 are both marked as 1, then
+the form index used as a secondary ordering criteria. In order to put
+something at the front of the list, you'd need to set it's order to 0.
+
+>>> ChoiceFormSet = formset_for_form(Choice, orderable=True)
+
+>>> initial = [{'choice': u'Calexico', 'votes': 100}, {'choice': u'Fergie', 'votes': 900}]
+>>> formset = ChoiceFormSet(initial=initial, auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" value="Calexico" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" value="100" /></li>
+<li>Order: <input type="text" name="choices-0-ORDER" value="1" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" value="Fergie" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" value="900" /></li>
+<li>Order: <input type="text" name="choices-1-ORDER" value="2" /></li>
+<li>Choice: <input type="text" name="choices-2-choice" /></li>
+<li>Votes: <input type="text" name="choices-2-votes" /></li>
+<li>Order: <input type="text" name="choices-2-ORDER" value="3" /></li>
+
+>>> data = {
+... 'choices-COUNT': '3', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-0-ORDER': '1',
+... 'choices-1-choice': 'Fergie',
+... 'choices-1-votes': '900',
+... 'choices-1-ORDER': '2',
+... 'choices-2-choice': 'The Decemberists',
+... 'choices-2-votes': '500',
+... 'choices-2-ORDER': '0',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> for clean_data in formset.clean_data:
+... print clean_data
+{'votes': 500, 'ORDER': 0, 'choice': u'The Decemberists'}
+{'votes': 100, 'ORDER': 1, 'choice': u'Calexico'}
+{'votes': 900, 'ORDER': 2, 'choice': u'Fergie'}
+
+# FormSets with ordering + deletion ###########################################
+
+Let's try throwing ordering and deletion into the same form.
+
+>>> ChoiceFormSet = formset_for_form(Choice, orderable=True, deletable=True)
+
+>>> initial = [
+... {'choice': u'Calexico', 'votes': 100},
+... {'choice': u'Fergie', 'votes': 900},
+... {'choice': u'The Decemberists', 'votes': 500},
+... ]
+>>> formset = ChoiceFormSet(initial=initial, auto_id=False, prefix='choices')
+>>> for form in formset.form_list:
+... print form.as_ul()
+<li>Choice: <input type="text" name="choices-0-choice" value="Calexico" /></li>
+<li>Votes: <input type="text" name="choices-0-votes" value="100" /></li>
+<li>Order: <input type="text" name="choices-0-ORDER" value="1" /></li>
+<li>Delete: <input type="checkbox" name="choices-0-DELETE" /></li>
+<li>Choice: <input type="text" name="choices-1-choice" value="Fergie" /></li>
+<li>Votes: <input type="text" name="choices-1-votes" value="900" /></li>
+<li>Order: <input type="text" name="choices-1-ORDER" value="2" /></li>
+<li>Delete: <input type="checkbox" name="choices-1-DELETE" /></li>
+<li>Choice: <input type="text" name="choices-2-choice" value="The Decemberists" /></li>
+<li>Votes: <input type="text" name="choices-2-votes" value="500" /></li>
+<li>Order: <input type="text" name="choices-2-ORDER" value="3" /></li>
+<li>Delete: <input type="checkbox" name="choices-2-DELETE" /></li>
+<li>Choice: <input type="text" name="choices-3-choice" /></li>
+<li>Votes: <input type="text" name="choices-3-votes" /></li>
+<li>Order: <input type="text" name="choices-3-ORDER" value="4" /></li>
+<li>Delete: <input type="checkbox" name="choices-3-DELETE" /></li>
+
+Let's delete Fergie, and put The Decemberists ahead of Calexico.
+
+>>> data = {
+... 'choices-COUNT': '4', # the number of forms rendered
+... 'choices-0-choice': 'Calexico',
+... 'choices-0-votes': '100',
+... 'choices-0-ORDER': '1',
+... 'choices-0-DELETE': '',
+... 'choices-1-choice': 'Fergie',
+... 'choices-1-votes': '900',
+... 'choices-1-ORDER': '2',
+... 'choices-1-DELETE': 'on',
+... 'choices-2-choice': 'The Decemberists',
+... 'choices-2-votes': '500',
+... 'choices-2-ORDER': '0',
+... 'choices-2-DELETE': '',
+... 'choices-3-choice': '',
+... 'choices-3-votes': '',
+... 'choices-3-ORDER': '4',
+... 'choices-3-DELETE': '',
+... }
+
+>>> formset = ChoiceFormSet(data, auto_id=False, prefix='choices')
+>>> formset.is_valid()
+True
+>>> for clean_data in formset.clean_data:
+... print clean_data
+{'votes': 500, 'DELETE': False, 'ORDER': 0, 'choice': u'The Decemberists'}
+{'votes': 100, 'DELETE': False, 'ORDER': 1, 'choice': u'Calexico'}
+>>> formset.deleted_data
+[{'votes': 900, 'DELETE': True, 'ORDER': 2, 'choice': u'Fergie'}]
+
+
+"""